Professional LINQ

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Scott Klein

"Professional LINQ"

The following example skips all the values in the sequence that are less than 50 and returns the
remaining values.
Int[] randomNumbers = {86, 2, 77, 94, 100, 65, 5, 22, 70, 55, 81, 66, 45};
IEnumerable takeTopFour =
randomNumbers.OrderByDescending(num => num).Take(4);
foreach (int number in takeTopFour)
listbox1.Items.Add(number);
When this query is run, the following numbers are returned:
100
94
86
81
This example could also be written using query syntax as follows:
IEnumerable takeTopFour =
(from n in randomNumbers
order by n descending
select n).Take(4);
TakeWhile
The TakeWhile operator returns elements based on a specified predicate function, and continues to take
the elements as long as the specified condition is true (i.e., the condition is not met). The remaining
elements are skipped.
87
Part I: Introduction to Project LINQ
The following example takes all the values in the sequence that are less than 50 and skips the
remaining values.
Int[] randomNumbers = {86, 2, 77, 94, 100, 65, 5, 22, 70, 55, 81, 66, 45};
IEnumerable takeGreaterThan50 =
randomNumbers.

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Scott Klein

"Professional LINQ"